[NFC] Reordering parameters in getFile and getFileOrSTDIN

In future patches I will be setting the IsText parameter frequently so I will refactor the args to be in the following order. I have removed the FileSize parameter because it is never used.

```
  static ErrorOr<std::unique_ptr<MemoryBuffer>>
  getFile(const Twine &Filename, bool IsText = false,
          bool RequiresNullTerminator = true, bool IsVolatile = false);

  static ErrorOr<std::unique_ptr<MemoryBuffer>>
  getFileOrSTDIN(const Twine &Filename, bool IsText = false,
                 bool RequiresNullTerminator = true);

 static ErrorOr<std::unique_ptr<MB>>
 getFileAux(const Twine &Filename, uint64_t MapSize, uint64_t Offset,
            bool IsText, bool RequiresNullTerminator, bool IsVolatile);

  static ErrorOr<std::unique_ptr<WritableMemoryBuffer>>
  getFile(const Twine &Filename, bool IsVolatile = false);
```

Reviewed By: jhenderson

Differential Revision: https://reviews.llvm.org/D99182

1 files changed, 2 insertions, 6 deletions

diff --git a/llvm/utils/FileCheck/FileCheck.cpp b/llvm/utils/FileCheck/FileCheck.cpp
index 12365e0..c1bb97f 100644
--- a/llvm/utils/FileCheck/FileCheck.cpp
+++ b/llvm/utils/FileCheck/FileCheck.cpp
@@ -821,9 +821,7 @@ int main(int argc, char **argv) {
 
   // Read the expected strings from the check file.
   ErrorOr<std::unique_ptr<MemoryBuffer>> CheckFileOrErr =
-      MemoryBuffer::getFileOrSTDIN(CheckFilename, /*FileSize=*/-1,
-                                   /*RequiresNullTerminator=*/true,
-                                   /*IsText=*/true);
+      MemoryBuffer::getFileOrSTDIN(CheckFilename, /*IsText=*/true);
   if (std::error_code EC = CheckFileOrErr.getError()) {
     errs() << "Could not open check file '" << CheckFilename
            << "': " << EC.message() << '\n';
@@ -845,9 +843,7 @@ int main(int argc, char **argv) {
 
   // Open the file to check and add it to SourceMgr.
   ErrorOr<std::unique_ptr<MemoryBuffer>> InputFileOrErr =
-      MemoryBuffer::getFileOrSTDIN(InputFilename, /*FileSize=*/-1,
-                                   /*RequiresNullTerminator=*/true,
-                                   /*IsText=*/true);
+      MemoryBuffer::getFileOrSTDIN(InputFilename, /*IsText=*/true);
   if (InputFilename == "-")
     InputFilename = "<stdin>"; // Overwrite for improved diagnostic messages
   if (std::error_code EC = InputFileOrErr.getError()) {